Concord, Mass.
1900.
June 3
(No 2)
much disturbed by its visit and after it had gone she
fluttered close about the old nest and once nearly entered
it after which she went back to the new one and
continued to work at it through the remainder of the 
forenoon.
Ball's Hill
Blue Jays
raiding for
birds' nests
  From what I have seen during the past two weeks
I should say that the Jays in the Ball's Hill region
have destroyed, during this period, practically all the
eggs that have been laid by the smaller birds in nests
built in trees & bushes within the limits of this region.
Their method of hunting for nests is peculiar & interesting.
They start out soon after sunrise, usually in pairs but
often three or four together, and move through the
woods very slowly taking the trees successively, hopping
from twig to twig or sailing on set wings deliberately &
with great care. While thus engaged they seldom scream
but they keep up almost incessantly a low, stuttering
er-er-er-er which may be heard, of course, at other
seasons but which is apparently used much more frequently
during the egging raids than on any other occasions.
  After dinner we packed up our things & put
both cabins in order & left for Cambridge by
the 4.10 train crossing the river & walking up
to the station in a pouring rain. Thus ended
my spring season at Ball's Hill in 1900 although
I shall probably return there for a day or two
at a time later in the present month.
We leave
Concord.
7